ENGINE
3B-3
SECTION 3B. FAILURE ANALYSIS
GENERAL
The following table lists common problems, probable
causes, and suggested remedies with section refer-
ences to detailed descriptions of remedial procedures.
PROBLEM PROBABLE CAUSE REMEDY
1. Engine will not start a. Parking brake disengaged or
mow switch on
b. Glow plug inoperative
c. Battery low on charge or
defective
d. Fuel tank empty or dirty
e. Fuse blown
f. Relay defective
g. Traction pedal not in neutral
h. Neutral switch out of adjust-
ment or defective
a. Engage parking brake, turn
off mow switch
b. Check glow plugs
c. Inspect the condition of the
battery and battery connec-
tions
d. Fill with fresh fuel
Change the fuel filter
Bleed the fuel lines
(Section 3D)
e. Replace fuse
f. Test and replace relay
(Section 10)
g. Check position of the pedal
h. Adjust or replace the switch
(Section 2 and Section 10)
2. Engine is hard to start or
runs poorly
a. Fuel level low, fuel or fuel fil-
ter dirty
b. Air cleaner dirty
c. Injectors, fuel pump faulty
d. Engine problem
a. Fill with fresh fuel
Change the fuel filter
Bleed fuel lines (Section 3D).
b. Inspect and replace the air fil-
ter (Section 3D)
c. Consult the engine manufac-
turer’s manual
d. Consult the engine manufac-
turer’s manual
3. Engine stops a. Fuel tank empty
b. Interlocks are not set before
leaving the operator’s seat
a. Fill with fresh fuel and bleed
the fuel lines (Section 3D)
b. Engage parking brake and
set mow switch to OFF
4. Engine overheating a. Coolant level low
b. Air intake restricted
c. Water pump belt broken
a. Inspect and add coolant
b. Clean air intake or radiator
c. Tighten or replace belt
3B
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